My 96 K3500 with an NV4500 had an original dual mass flywheel, it was replaced with a single at 90K miles. then kept the same at 180K miles. Did not notice the difference between the two. I was towing upwards of 12K lbs of trailer. Dual mass setup was rated to 12500 gcwr, when the single was put in after 97 or 98 OEM, the gcwr went equal with the auto at 14500. To make a long story short, I was hardly ever towing below either of those two numbers! Usually was over 12K minimum, upwards of 22K lbs a few times.
I doubt the single will cause you issues.
Marty
